From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: David1.Zhou@amd.com, hch@infradead.org, jgg@ziepe.ca,
daniel@ffwll.ch, dri-devel@lists.freedesktop.org,
linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org,
intel-gfx@lists.freedesktop.org
Subject: [Intel-gfx] [PATCH 2/6] dma-buf: add peer2peer flag
Date: Wed, 11 Mar 2020 14:51:54 +0100 [thread overview]
Message-ID: <20200311135158.3310-3-christian.koenig@amd.com> (raw)
In-Reply-To: <20200311135158.3310-1-christian.koenig@amd.com>
Add a peer2peer flag noting that the importer can deal with device
resources which are not backed by pages.
Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/dma-buf/dma-buf.c | 2 ++
include/linux/dma-buf.h | 10 ++++++++++
2 files changed, 12 insertions(+)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index f4ace9af2191..f9220928ec90 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -689,6 +689,8 @@ dma_buf_dynamic_attach(struct dma_buf *dmabuf, struct device *dev,
attach->dev = dev;
attach->dmabuf = dmabuf;
+ if (importer_ops)
+ attach->peer2peer = importer_ops->allow_peer2peer;
attach->importer_ops = importer_ops;
attach->importer_priv = importer_priv;
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 1ade486fc2bb..82e0a4a64601 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -334,6 +334,14 @@ struct dma_buf {
* Attachment operations implemented by the importer.
*/
struct dma_buf_attach_ops {
+ /**
+ * @allow_peer2peer:
+ *
+ * If this is set to true the importer must be able to handle peer
+ * resources without struct pages.
+ */
+ bool allow_peer2peer;
+
/**
* @move_notify
*
@@ -362,6 +370,7 @@ struct dma_buf_attach_ops {
* @node: list of dma_buf_attachment, protected by dma_resv lock of the dmabuf.
* @sgt: cached mapping.
* @dir: direction of cached mapping.
+ * @peer2peer: true if the importer can handle peer resources without pages.
* @priv: exporter specific attachment data.
* @importer_ops: importer operations for this attachment, if provided
* dma_buf_map/unmap_attachment() must be called with the dma_resv lock held.
@@ -382,6 +391,7 @@ struct dma_buf_attachment {
struct list_head node;
struct sg_table *sgt;
enum dma_data_direction dir;
+ bool peer2peer;
const struct dma_buf_attach_ops *importer_ops;
void *importer_priv;
void *priv;
--
2.17.1
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next prev parent reply other threads:[~2020-03-11 15:04 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-11 13:51 [Intel-gfx] P2P for DMA-buf Christian König
2020-03-11 13:51 ` [Intel-gfx] [PATCH 1/6] lib/scatterlist: add sg_set_dma_addr() function Christian König
2020-03-11 15:28 ` Christoph Hellwig
2020-03-12 10:14 ` Christian König
2020-03-12 10:19 ` Christoph Hellwig
2020-03-12 10:31 ` Christian König
2020-03-12 10:47 ` Christoph Hellwig
2020-03-12 11:02 ` Christian König
[not found] ` <20200312141928.GK31668@ziepe.ca>
2020-03-12 15:39 ` Christian König
2020-03-12 16:13 ` Logan Gunthorpe
2020-03-13 11:21 ` Christoph Hellwig
2020-03-13 13:33 ` Christian König
[not found] ` <20200313121742.GZ31668@ziepe.ca>
2020-03-16 8:56 ` Christoph Hellwig
2020-03-16 9:41 ` Christian König
2020-03-16 9:52 ` Christoph Hellwig
2020-03-11 13:51 ` Christian König [this message]
2020-03-11 13:51 ` [Intel-gfx] [PATCH 3/6] drm/amdgpu: note that we can handle peer2peer DMA-buf Christian König
2020-03-11 13:51 ` [Intel-gfx] [PATCH 4/6] drm/amdgpu: add checks if DMA-buf P2P is supported Christian König
[not found] ` <20200311140415.GB31668@ziepe.ca>
2020-03-11 14:33 ` Christian König
[not found] ` <20200311143835.GD31668@ziepe.ca>
2020-03-11 14:43 ` Christian König
2020-03-11 13:51 ` [Intel-gfx] [PATCH 5/6] drm/amdgpu: add support for exporting VRAM using DMA-buf v2 Christian König
2020-03-11 15:08 ` Alex Deucher
2020-03-11 13:51 ` [Intel-gfx] [PATCH 6/6] drm/amdgpu: improve amdgpu_gem_info debugfs file Christian König
2020-03-11 18:09 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [1/6] lib/scatterlist: add sg_set_dma_addr() function Patchwork
2020-03-11 18:34 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
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